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# Copyright (C) 2007, One Laptop Per Child
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the
# Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
import gobject
import gtk
from sugar.graphics import style
from sugar.graphics.palette import Palette, ToolInvoker
from sugar.graphics.toolbutton import ToolButton
from sugar.graphics.icon import Icon
_PREVIOUS_PAGE = 0
_NEXT_PAGE = 1
class _TrayViewport(gtk.Viewport):
__gproperties__ = {
'scrollable' : (bool, None, None, False,
gobject.PARAM_READABLE),
'can-scroll-prev' : (bool, None, None, False,
gobject.PARAM_READABLE),
'can-scroll-next' : (bool, None, None, False,
gobject.PARAM_READABLE),
}
def __init__(self, orientation):
self.orientation = orientation
self._scrollable = False
self._can_scroll_next = False
self._can_scroll_prev = False
gobject.GObject.__init__(self)
self.set_shadow_type(gtk.SHADOW_NONE)
self.traybar = gtk.Toolbar()
self.traybar.set_orientation(orientation)
self.traybar.set_show_arrow(False)
self.add(self.traybar)
self.traybar.show()
self.connect('size_allocate', self._size_allocate_cb)
if self.orientation == gtk.ORIENTATION_HORIZONTAL:
adj = self.get_hadjustment()
else:
adj = self.get_vadjustment()
adj.connect('changed', self._adjustment_changed_cb)
adj.connect('value-changed', self._adjustment_changed_cb)
def scroll(self, direction):
if direction == _PREVIOUS_PAGE:
self._scroll_previous()
elif direction == _NEXT_PAGE:
self._scroll_next()
def _scroll_next(self):
if self.orientation == gtk.ORIENTATION_HORIZONTAL:
adj = self.get_hadjustment()
new_value = adj.value + self.allocation.width
adj.value = min(new_value, adj.upper - self.allocation.width)
else:
adj = self.get_vadjustment()
new_value = adj.value + self.allocation.height
adj.value = min(new_value, adj.upper - self.allocation.height)
def _scroll_previous(self):
if self.orientation == gtk.ORIENTATION_HORIZONTAL:
adj = self.get_hadjustment()
new_value = adj.value - self.allocation.width
adj.value = max(adj.lower, new_value)
else:
adj = self.get_vadjustment()
new_value = adj.value - self.allocation.height
adj.value = max(adj.lower, new_value)
def do_size_request(self, requisition):
child_requisition = self.child.size_request()
if self.orientation == gtk.ORIENTATION_HORIZONTAL:
requisition[0] = 0
requisition[1] = child_requisition[1]
else:
requisition[0] = child_requisition[0]
requisition[1] = 0
def do_get_property(self, pspec):
if pspec.name == 'scrollable':
return self._scrollable
elif pspec.name == 'can-scroll-next':
return self._can_scroll_next
elif pspec.name == 'can-scroll-prev':
return self._can_scroll_prev
def _size_allocate_cb(self, viewport, allocation):
bar_requisition = self.traybar.get_child_requisition()
if self.orientation == gtk.ORIENTATION_HORIZONTAL:
scrollable = bar_requisition[0] > allocation.width
else:
scrollable = bar_requisition[1] > allocation.height
if scrollable != self._scrollable:
self._scrollable = scrollable
self.notify('scrollable')
def _adjustment_changed_cb(self, adjustment):
if adjustment.value <= adjustment.lower:
can_scroll_prev = False
else:
can_scroll_prev = True
if adjustment.value + adjustment.page_size >= adjustment.upper:
can_scroll_next = False
else:
can_scroll_next = True
if can_scroll_prev != self._can_scroll_prev:
self._can_scroll_prev = can_scroll_prev
self.notify('can-scroll-prev')
if can_scroll_next != self._can_scroll_next:
self._can_scroll_next = can_scroll_next
self.notify('can-scroll-next')
class _TrayScrollButton(ToolButton):
def __init__(self, icon_name, scroll_direction):
ToolButton.__init__(self)
self._viewport = None
self._scroll_direction = scroll_direction
self.set_size_request(style.GRID_CELL_SIZE, style.GRID_CELL_SIZE)
self.icon = Icon(icon_name = icon_name,
icon_size=gtk.ICON_SIZE_SMALL_TOOLBAR)
# The alignment is a hack to work around gtk.ToolButton code
# that sets the icon_size when the icon_widget is a gtk.Image
alignment = gtk.Alignment(0.5, 0.5)
alignment.add(self.icon)
self.set_icon_widget(alignment)
alignment.show_all()
self.connect('clicked', self._clicked_cb)
def set_viewport(self, viewport):
self._viewport = viewport
self._viewport.connect('notify::scrollable',
self._viewport_scrollable_changed_cb)
if self._scroll_direction == _PREVIOUS_PAGE:
self._viewport.connect('notify::can-scroll-prev',
self._viewport_can_scroll_dir_changed_cb)
self.set_sensitive(self._viewport.props.can_scroll_prev)
else:
self._viewport.connect('notify::can-scroll-next',
self._viewport_can_scroll_dir_changed_cb)
self.set_sensitive(self._viewport.props.can_scroll_next)
def _viewport_scrollable_changed_cb(self, viewport, pspec):
self.props.visible = self._viewport.props.scrollable
def _viewport_can_scroll_dir_changed_cb(self, viewport, pspec):
if self._scroll_direction == _PREVIOUS_PAGE:
sensitive = self._viewport.props.can_scroll_prev
else:
sensitive = self._viewport.props.can_scroll_next
self.set_sensitive(sensitive)
def _clicked_cb(self, button):
self._viewport.scroll(self._scroll_direction)
viewport = property(fset=set_viewport)
class HTray(gtk.HBox):
def __init__(self, **kwargs):
gobject.GObject.__init__(self, **kwargs)
self.set_direction(gtk.TEXT_DIR_LTR)
scroll_left = _TrayScrollButton('go-left', _PREVIOUS_PAGE)
self.pack_start(scroll_left, False)
self._viewport = _TrayViewport(gtk.ORIENTATION_HORIZONTAL)
self.pack_start(self._viewport)
self._viewport.show()
scroll_right = _TrayScrollButton('go-right', _NEXT_PAGE)
self.pack_start(scroll_right, False)
scroll_left.viewport = self._viewport
scroll_right.viewport = self._viewport
def get_children(self):
return self._viewport.traybar.get_children()
def add_item(self, item, index=-1):
self._viewport.traybar.insert(item, index)
def remove_item(self, item):
self._viewport.traybar.remove(item)
def get_item_index(self, item):
return self._viewport.traybar.get_item_index(item)
class VTray(gtk.VBox):
def __init__(self, **kwargs):
gobject.GObject.__init__(self, **kwargs)
# FIXME we need a go-up icon
scroll_left = _TrayScrollButton('go-left', _PREVIOUS_PAGE)
self.pack_start(scroll_left, False)
self._viewport = _TrayViewport(gtk.ORIENTATION_VERTICAL)
self.pack_start(self._viewport)
self._viewport.show()
# FIXME we need a go-down icon
scroll_right = _TrayScrollButton('go-right', _NEXT_PAGE)
self.pack_start(scroll_right, False)
scroll_left.viewport = self._viewport
scroll_right.viewport = self._viewport
def get_children(self):
return self._viewport.traybar.get_children()
def add_item(self, item, index=-1):
self._viewport.traybar.insert(item, index)
def remove_item(self, item):
self._viewport.traybar.remove(item)
def get_item_index(self, item):
return self._viewport.traybar.get_item_index(item)
class TrayButton(ToolButton):
def __init__(self, **kwargs):
ToolButton.__init__(self, **kwargs)
class _IconWidget(gtk.EventBox):
__gtype_name__ = "SugarTrayIconWidget"
def __init__(self, icon_name=None, xo_color=None):
gtk.EventBox.__init__(self)
self._palette = None
self.set_app_paintable(True)
icon = Icon(icon_name=icon_name, xo_color=xo_color,
icon_size=gtk.ICON_SIZE_LARGE_TOOLBAR)
self.add(icon)
icon.show()
def do_expose_event(self, event):
if self._palette and self._palette.is_up():
invoker = self._palette.props.invoker
invoker.draw_rectangle(event, self._palette)
gtk.EventBox.do_expose_event(self, event)
def set_palette(self, palette):
if self._palette is not None:
self._palette.props.invoker = None
self._palette = palette
self._palette.props.invoker = ToolInvoker(self)
class TrayIcon(gtk.ToolItem):
__gtype_name__ = "SugarTrayIcon"
def __init__(self, icon_name=None, xo_color=None):
gtk.ToolItem.__init__(self)
self._icon_widget = _IconWidget(icon_name, xo_color)
self.add(self._icon_widget)
self._icon_widget.show()
self.set_size_request(style.GRID_CELL_SIZE, style.GRID_CELL_SIZE)
def set_palette(self, palette):
self._icon_widget.set_palette(palette)
def set_tooltip(self, text):
self.set_palette(Palette(text))
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